PSYCH 330 1st Edition Lecture 20Sleepinfants sleep the most hrs a dayyour circadian rhythms evolvecharacteristically: kids wake up earlier, close to 20 yr olds are late risers, the elderly are early risersduring sleep you have a decreased response to stimuli thus the stimuli has to be stronger marine mammals only have one hemisphere asleep at a timeEEGmeasures brain waves EMGmeasures muscleEDGmeasures eye movement during REMjerksinitial muscle relaxation, people often interpret this as fallingNonREM sleepStages1/2fast brain waves, low muscle activity, no eye movement Stages3/4”deep sleep”, high amplitude or peaks but slow brain wavesREMmuscle paralysis, fast waves and rapid eye movementparadoxical brain is working but muscles are notendogenous factorsour bodies are telling us to sleep, biological clockexogenousoutside, sunlightPhysiologicallycircannual rhythmyearly cyclesbirds flying southcircadian rhythmdaily sleep, suprachiasmatic nucleus=primary pacemaker for circadianrhythmtake the retinohypothalamic tract to get thereultraradianless than a dayeating infraradian rhythmmenstrualThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Benefits of sleep1.animals sleep more so they’re safe from predators 2.rest/heal3.growth4.learnpart of encoding memories happens during sleep5.emotional processing.decision making is impaired with little sleep, casinos take advantage of this by keeping you up so you can keep making bad
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